ADM2483BRWZ Analog Devices Inc, ADM2483BRWZ Datasheet - Page 14

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ADM2483BRWZ

Manufacturer Part Number
ADM2483BRWZ
Description
IC TXRX RS485 ISOLATED 16SOIC
Manufacturer
Analog Devices Inc
Series
iCoupler®r
Datasheet

Specifications of ADM2483BRWZ

Inputs - Side 1/side 2
RS-485
Number Of Channels
1
Isolation Rating
2500Vrms
Voltage - Supply
4.75 V ~ 5.25 V
Data Rate
500kbps
Propagation Delay
620ns
Output Type
Logic
Package / Case
16-SOIC (0.300", 7.5mm Width)
Operating Temperature
-40°C ~ 85°C
Device Type
Differential Transceiver
Ic Interface Type
RS485
No. Of Drivers
2
Supply Voltage Range
2.7V To 5.5V
Driver Case Style
SOIC
No. Of Pins
16
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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ADM2483
CIRCUIT DESCRIPTION
ELECTRICAL ISOLATION
In the ADM2483, electrical isolation is implemented on the
logic side of the interface. Therefore, the part has two main
sections: a digital isolation section and a transceiver section (see
Figure 26). Driver input and data enable signals, applied to the
TxD and DE pins, respectively, and referenced to logic ground
(GND
transceiver section referenced to isolated ground (GND
Similarly, the receiver output, referenced to isolated ground in
the transceiver section, is coupled across the isolation barrier to
appear at the RxD pin referenced to logic ground.
1
), are coupled across an isolation barrier to appear at the
RxD
TxD
DE
RE
Figure 26. ADM2483 Digital Isolation and Transceiver Sections
GND
V
DD1
DIGITAL ISOLATION
1
ENCODE
ENCODE
ENCODE
2
).
ISOLATION
BARRIER
Rev. B | Page 14 of 20
DECODE
DECODE
DECODE
iCoupler Technology
The digital signals are transmitted across the isolation barrier
using iCoupler technology. This technique uses chip-scale
transformer windings to couple the digital signals magnetically
from one side of the barrier to the other. Digital inputs are
encoded into waveforms that are capable of exciting the
primary transformer winding. At the secondary winding, the
induced waveforms are then decoded into the binary value that
was originally transmitted.
GND
V
DD2
TRANSCEIVER
2
D
R
A
B

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